curl --request PUT \
  --url https://api.opencard.io/api/v1/application/accounts/{accountId}/organizations/{organizationId}/cardholders/{cardHolderId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reference_id": "employee_john_99"
}
'

{
  "id": 15,
  "reference_id": "employee_john_42",
  "organization_id": 3,
  "identity_id": 123,
  "email": "john@acme.se",
  "created_at": "2026-06-08T10:00:00.000000Z",
  "updated_at": "2026-06-08T10:30:00.000000Z",
  "meta": {
    "ssn": true,
    "signed": true,
    "signed_at": "2026-06-08T10:30:00.000000Z",
    "email_status": "delivered",
    "pdpc_url": "https://sandbox-api.opencard.io/accounts/1/pdpcs/8/sign/abc...",
    "system": "Acme EMS",
    "organization_number": "5561234567"
  },
  "identity": {
    "name": "Anna Andersson",
    "employee_id": "001"
  }
}